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Chapter 11
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Management ofChronic Constrictive Pericarditis
Chronic constrictive pericarditis belongs to the category of diseases, which usually result in cardiac failure with normal ejection fraction. Other entities in this group which should be differentiated from chronic constrictive pericarditis are restrictive cardiomyopathy, cardiac amyloidosis, tropical endomyocardial brosis, Budd­Chiari syndrome, and a few other diseases [1, 2, 812, 2230, 40, 48, 58, 6264, 82
85, 8890, 102, 128, 156160, 201]
Clinical features suggestive of constrictive pericarditis include presence of con­gestive cardiac failure with absence of systemic hypertension or myocardial or val­vular disease. Claude Beck stressed on the triad of cardiac compression, raised venous pressure, and ascites along with a quiet small heart. History of tubercular or bacterial pericardial or pleural effusion, may suggest the underlying etiology [13,
14, 64].
Presence of Kussmaul’s sign although positive is not specic to constrictive peri­carditis, since it can also be seen among patients with endomyocardial brosis, restrictive cardiomyopathy, right ventricular failure and tricuspid stenosis [2229,
8285, 102104]. Among patients of constrictive pericarditis being referred for
pericardiectomy, Ling and associates from the Mayo Clinic found that 19% had pulsus paradoxus and 21% had Kussmaul’s sign [88, 92, 93].
A completely normal electrocardiogram is rare in constrictive pericarditis. Although non-specic, it may demonstrate low voltage QRS complex, ST-T abnor­malities, p-mitrale, and atrial brillation [1, 2231, 5860, 106, 107, 133, 167]. Some clinical features help in differentiating constrictive pericarditis from similar pathologies. Pulmonary congestion is usually absent in constrictive pericarditis but present in restrictive cardiomyopathy [1, 9, 15, 2230]. A low voltage QRS complex suggests cardiac amyloidosis. Presence of patchy endomyocardial calcication and cardiomegaly suggest endomyocardial brosis or restrictive cardiomyopathy [31,
108, 122].
It needs to be emphasized that no single approach is conclusive to diagnose all cases of constrictive pericarditis. Pulsus paradoxus, reduced pulse pressure, reduced
Ltd. 2023 U. K. Chowdhury, L. K. Sankhyan, Surgical Treatment of Chronic Constrictive Pericarditis, https://doi.org/10.1007/978-981-99-5808-5_11
199© The Author(s), under exclusive license to Springer Nature Singapore Pte
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11 Management ofChronic Constrictive Pericarditis
systolic blood pressure, radiological evidence of diminished cardiac pulsation, peri­cardial calcication, characteristic haemodynamic changes, electrocardiographic, echocardiographic, computed-tomographic, magnetic resonance imaging ndings, endomyocardial biopsy, and inadequate medical response to congestive cardiac fail­ure are some of the ndings to suggest the presence of chronic constrictive pericar­ditis [1, 812, 16, 2234, 103108, 120122, 132, 133, 141153, 193197, 202,
208, 215]. Corroborative ndings of at least two investigations are required, namely
computed tomography, echocardiography, magnetic resonance imaging, and/or car­diac catheterization, to conclusively establish the diagnosis of constrictive pericar­ditis [1, 2234, 122, 189192, 202207]. If constrictive pericarditis is diagnosed correctly, timely surgical intervention will be curative [9, 2231, 82, 83, 108, 153].
After establishing the diagnosis, the disease activity should be assessed by the patient’s clinical condition and erythrocyte sedimentation rate. The medical treat­ment for symptomatic patients consists of restricted physical activity, minimal sodium intake, high protein diet, steroids, non-steroidal anti-inammatory agents, and antibiotics. Although the usefulness of digitalis is controversial, it is the practice in the author’s institution to digitalize patients with atrial brillation and utter to prevent perioperative atrial brillation [2229]. Excessive use of diuretics in the preoperative period is not desirable, to prevent intravascular volume depletion and sudden collapse. Slow drainage of large pleural, and pericardial effusions provides symptomatic relief. It is the practice to insert an indwelling peritoneal drainage can­nula and drain intraoperatively in the author’s institution to prevent sudden auto­transfusion following pericardiectomy [22, 26, 27]. In cases of tubercular aetiology, anti-tubercular treatment should be started, although the progression of the disease process to cardiac constriction does not disappear in majority of cases.
Establishing a bacteriological or histological diagnosis of tubercular aetiology is often difcult [17, 18, 4346, 82, 9598, 159161]. A history suggestive of lymph node tuberculosis, pulmonary tuberculosis and skeletal tuberculosis may be seen in varying percentage of patients [2130, 35]. The variability of detection of tubercle bacilli ranges from 0 to 42% in different series [10, 11, 4144, 9699, 162, 165]. The sensitivity of pericardial biopsy for diagnosis of tuberculosis ranges from 10% to 81%. A tubercular aetiology is to be considered if excised pericardium on histo­pathology shows caseation, giant cells, granulomas or when if the uid removed during surgery tests positive for tuberculosis [2130, 35]. In tubercular pericardial effusion, the enlarged mediastinal nodes which are not routinely seen on a chest radiograph, but can be visualised on computed tomography imaging or magnetic resonance imaging [34, 35, 104, 109113, 150, 162].
Presence of pericardial effusion in patients from tubercular endemic areas, par­ticularly those having HIV infection, is considered as tubercular in aetiology in absence of other alternative causes [112, 113, 129]. Based on histologic or micro­biological criteria, about two-thirds of these cases are diagnosed as tuberculosis [162165]. In the remaining patients, other supportive evidence for tubercular etiol­ogy include an adequate response to antituberculosis therapy. Anti-tubercular treat­ment should be started for patients residing in non-endemic areas even in the
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absence of a diagnosis of tubercular pericarditis [2230, 34, 4951, 64, 65, 109
113, 134139, 159175, 210214].
The therapeutic strategy in patients with non-calcic constrictive pericarditis includes a trial of anti-tubercular treatment for 6–8weeks and referring patients showing no improvement or worsening of pericardial constriction clinically for pericardiectomy [9, 19, 2230, 47, 6668, 109115, 129, 162175]. There are no trials specically addressing the optimal drug regime and duration of treatment for tuberculous pericarditis. Over three decades, the published literature along with our observations suggests that there is no justication in advising anti-tubercular drugs for treatment of tuberculous pericarditis any longer than for extrapulmonary tuber­culosis [2230, 35, 51, 53, 95, 104, 109113, 135, 138, 160, 162, 168, 176178,
210213]. According to the WHO guidelines, an initial two month regimen com-
prising of isoniazid, pyrazinamide, rifampicin, and ethambutol followed by rifampi­cin and isoniazid for 4months duration (total 6 months of therapy) is given for tuberculous pericarditis [214] We advocate treatment of tuberculous pericarditis as per WHO guidelines for treatment of extrapulmonary tuberculosis.
According to WHO guidelines, for new patients with tuberculous pericarditis (strong/high grade evidence of pulmonary TB) the optimal dosing frequency is daily throughout the course of drug therapy. For patient who is not living in an HIV­prevalent setting or living with HIV, thrice-weekly dosing [2(HRZE)3 4(HR3)] may be considered as an alternative to the above recommendation, provided that every dose of drug therapy is directly observed (conditional/high and moderate grade of evidence). Treating patients for nine months or longer does not give better results but has the disadvantage of poor compliance and increased cost. Short-course che­motherapy seems to be effective in treating TB in HIV-infected patients [162, 168,
175, 214].
Overall, survival is dramatically increased in tuberculous pericarditis with anti­tuberculosis chemotherapy. Mortality which used to range between 80% to 90% in the pre-antibiotic era, currently ranges from 17% to 34% in HIV-positive individu­als and 8% to 17% in HIV-negative patients [2229, 36, 49, 50, 64, 65, 104, 109,
113, 125127, 159176, 210213].
Adjunctive oral corticosteroids are recommended for survival benet in patients of tuberculous pericarditis. The drug choice and its dosage (methylprednisolone, prednisolone, prednisone) and route of administration (intravenous, oral, intraperi­cardial) is variable [1, 2229, 104, 109, 113, 125, 159169, 174]. However, studies have not shown any signicant benet pertaining to progression to constrictive peri­carditis or reaccumulation of pericardial effusion [1, 3, 2229, 35, 86, 87, 104,
108114, 123127, 136, 138, 162, 165, 174, 179181]. Rifampicin-containing drug
regimen when used along with corticosteroids results in signicant decrease in mor­tality as shown by systematic meta-analysis [2229, 35, 104, 109, 113, 125, 138,
139, 159165, 174].
The clinical presentation of effusive-constrictive pericarditis may be secondary to pericardial effusion with cardiac tamponade or pericardial constriction causing impaired diastolic lling [9, 2229, 69, 70, 114, 129, 161, 171, 173, 176, 183186]. There is presence of diastolic cardiac constriction and pericardial thickening
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11 Management ofChronic Constrictive Pericarditis
alongwith uid collection between the parietal and visceral pericardium [7078]. The clinical, radiological, echocardiographic and haemodynamic ndings are often mixtures of those associated with effusion and constriction [9, 19, 2229]. The car­diopericardial silhouette may be larger on a chest roentgenogram than in those with purely chronic constrictive pericarditis.
Usually, the visceral pericardium is maximally involved. An accepted denition is failure of reduction of right ventricular end-diastolic, right atrial, and pulmonary capillary wedge pressures by at least 50% to less than 10mmHg when intrapericar­dial pressure is decreased to almost zero by pericardiocentesis and/or all detectable uid is removed [169, 186]. Early pericardiectomy may be desirable if pericardio­centesis fails to drain loculated pericardial effusions, in cases of recurrent effusions, or if echocardiographic/integrated imaging studies are suggestive of effusive­constrictive disease or early constrictive pericarditis after 4 to 6weeks of antituber­cular drug therapy [7176, 104, 159, 160, 168, 180, 198].
Presence of calcic constrictive pericarditis is an absolute indication of pericardi­ectomy. Calcic pericardium signies late presentation with myocardial brosis and myocardial penetration, causing left ventricular dysfunction that may preclude sur­gery [9, 57, 7178, 92, 93, 99, 100, 140]. However, we have been able to remove the calcic spurs in all patients undergoing pericardiectomy in our institution [2229].
Post-transplant constrictive pericarditis can be misdiagnosed as a rejection epi­sode or restrictive cardiomyopathy. An integration of clinical and multimodality imaging is essential to establish an early diagnosis of post-transplant constrictive pericarditis. A subxiphoid pericardiostomy for pericardial effusion followed by a radical pericardiectomy is recommended for management of these patients [20, 37,
38, 79, 80, 90, 99, 198, 200].
The mainstay of management of chronic constrictive pericarditis is surgical decortication of the entire pericardium including the pericardium posterior to the phrenic nerve, diaphragmatic pericardium and visceral epicardial peel, without causing injury to cardiac chambers, great vessels and coronaries. It is desirable to minimize cardiac manipulations during surgical decortication to avoid/minimize myocardial oedema in the perioperative period. Following surgery, there is improved survival of patients having chronic constrictive pericarditis [21, 22, 26, 8287, 93,
105]. Pericardiectomy has poor results when myocardium is predominantly involved
and has better results with dominant constrictive element, which may be reliably assessed by cardiac magnetic resonance and speckle tracking echocardiography [47, 150]. Patients diagnosed with chronic constrictive pericarditis having increased central venous pressure / with right atrial pressure more than 12mmHg with or without presence of hepatorenal dysfunction, pleural effusion, and massive ascites; with decompensated haemodynamics requiring ventilator support and ino­tropes during preoperative period and with patchy/focal calcic pericarditis were candidates selected for semi urgent total pericardiectomy by several investigators across the globe [8, 2535, 40, 48, 49, 54, 55, 92, 93, 105, 117, 141, 187189],
Certain features should be considered while deciding approach for surgical peri­cardiectomy. Patients with calcic pericardial patch compressing mainly the right ventricular outow tract and right atrium, annular constrictive pericarditis, calcic
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spurs penetrating the ventricular chambers, circumferential “cocoon” calcication encompassing all cardiac chambers, post mediastinal irradiation constrictive peri­carditis, recurrent pericarditis following previous partial pericardiectomy, previous open heart surgery, a gradient at the superior and/or inferior cavoatrial junction more than 2mmHg, extracardiac intrapericardial mass are considered contraindica­tions for left anterolateral thoracotomy approach. Median sternotomy is usually pre­ferred in above subset of patients for easy institution of cardiopulmonary bypass for inadvertent cardiac injury and bleeding and improved surgical exposure [2229, 92,
93, 109]. Additionally, left anterolateral thoracotomy approach is usually indicated
for patients with effusive and pyogenic pericardial diseases [2229].
Although using cardiopulmonary bypass routinely for achieving total pericardi­ectomy is a debatable issue, it may be employed in specic circumstances, namely (i) cardiac surgery or previous partial pericardiectomy; (ii) inadvertent injury to cardiac chambers or great vessels; (iii) pericardiectomy for post mediastinal irradia­tion; (iv) coexistent cardiac lesion; and (v) presence of calcic pericardial “cocoon” encompassing all cardiac chambers [8, 2535, 40, 48, 49, 92, 93, 141, 189],
Cardiopulmonary bypass facilitates surgical dissection by emptying the ventric­ular cavities and making appropriate plane of dissection visible and also helps in managing inadvertent cardiac injury. Therefore, one should not be reluctant to uti­lize cardiopulmonary bypass if needed to facilitate a complete pericardial resection that will undoubtedly impact patient outcomes. Additionally, use of cardiopulmo­nary bypass in patients with massive ascites helps in controlling the uid shifts and ultraltrating some of this uid off, thus avoiding cardiac distension [2230, 54, 55,
92, 93, 105, 117, 187, 188].
The following perioperative management protocol is practiced at the author’s institution:
• For chronic constrictive pericarditis with signicant pleural effusion on right
side undergoing pericardiectomy via left anterolateral thoracotomy approach, a
right-sided intercostal drain is placed prior to positioning the patient to prevent
respiratory and hemodynamic compromise.
• Both pleural cavities are electively opened and drained whenever possible. The
pleural and pericardial cavities are electively washed using normal saline.
• It is the practice to insert an indwelling peritoneal drainage cannula and drain
intraoperatively to prevent sudden autotransfusion following pericardiectomy
[22, 26, 27].
• Inotropes, namely dopamine, dobutamine, and/or adrenaline, are administered
intraoperatively on completion of pericardiectomy.
• It is desirable to electively place two ventricular and two atrial pacing wires in all
patients.
• Electrolyte imbalance should be avoided.
• Intravenous uids should be administered judiciously. It is desirable not to
administer more than 1 ml/kg of intravenous uids to prevent cardiac
overdistension.
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• No bolus intravenous uids/plasma products or blood should be administered
postoperatively to prevent sudden cardiac over-distension and failure of Starling’s
phenomenon.
• Anti-arrhythmic drugs, namely intravenous lignocaine and amiodarone need to
be administered in selected instances of patients with supraventricular and ven-
tricular arrhythmias in the postoperative period.
• Parenteral administration of plasma proteins or albumin may be required in the
postoperative period. There may be transient deterioration of hepatic and renal
function in the postoperative period which needs to be managed on an individu-
alized basis.
• It is the author’s practice not to administer bolus intravenous furosemide at a
high dose to manage low urine output. A combination of intravenous infusion of
furosemide, spironolactone, and/or acetazolamide and manipulation of inotropes
is extremely helpful in the great majority of cases to manage low urine output.
An occasional patient may require peritoneal dialysis or hemodialysis for a vari-
able postoperative period.
• Central venous pressure monitoring being a static preload indicator, may not suf-
ce for haemodynamic assessment when used alone. For haemodynamic moni-
toring of patients presenting with low cardiac output syndrome after
pericardiectomy or pericardiostomy, Vigileo™/FloTrac™ device may be the
investigation of choice [27, 56].
• Electively using inotropes like dobutamine and dopamine immediately after
completion of pericardiectomy is safer than instituting later in the postoperative
period. Trial administration of intravenous uid or blood in these patients may
actually be deleterious.
• For decreasing postoperative myocardial oedema, it is mandatory to do minimal
cardiac manipulation and avoid intermittent prolonged hypotensive episodes
during pericardiectomy.
The majority of patients undergoing radical/total pericardiectomy demonstrate signs of varying degrees of low cardiac output syndrome within 6–8hours follow­ing surgery, thus requiring thoughtful intervention and exquisitely diligent bedside monitoring. An accepted constellation of physiologic and haemodynamic altera­tions may alert the cardiac intensivist to the presence of low cardiac output syn­drome [2230, 50, 54, 55, 92, 93, 112, 117119, 130, 179183, 187, 188, 199, 216].
Accordingly, to dene low output syndrome, a combination of relevant clinical, bedside echocardiographic and laboratory criteria is used. The various diagnostic criteria used are: decreased toe temperature, cold extremities, absent pedal pulses, reduced systolic pressure, metabolic acidosis, increased serum lactate levels (2.0mmol/L, 2hours), impaired renal function and oliguria (<1.0mL.kg−1.h−1), low mixed venous oxygen saturation (50%), and blunt sensorium [2230, 50, 54,
55, 92, 93, 112, 117119, 130, 179183, 187, 188, 199, 216]. In addition, low car-
diac output syndrome is diagnosed when patient requires inotropic support namely dobutamine at 5–10μg/[kg·min], dopamine at 4–10μg/[kg·min], milrinone (50μg/ kg intravenous bolus followed by 0.375–0.75 μg.kg−1.min−1), epinephrine at
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0.01–0.1μg/[kg·min], either alone or in combination during surgery or in intensive care unit, for maintaining stable haemodynamic parameters in the absence of resid­ual structural lesions such as signicant valvular lesions and mechanical external compression, residual mechanical cardiac constriction, after correcting blood gas or electrolyte abnormalities and after adjusting preload to its optimal value. Another diagnostic criteria for low-output syndrome is an escalating requirement of the above-mentioned inotropes with or without use of intra-aortic balloon counterpulsa­tion along with reduction of afterload with sodium nitroprusside. Patients who need renal dose of dopamine (less than 4μg/kg/min) are not considered to be in low cardiac output state [2230, 50, 54, 55, 92, 93, 112, 117119, 130, 179183, 187,
188, 199, 216].
In patients with massive pericardial effusion, gradual pericardiocentesis helps gradual myocardial adaptation. After stable hemodynamics is achieved, complete pericardial decompression is safe.
Hemodynamically, impaired ventricular diastolic compliance is the hallmark for chronic constrictive pericarditis. Massive uid shifts occur from the extravascular to intravascular space following a successful pericardiectomy. This autotransfusion causes failure of Frank-Starling mechanism, resulting in acute cardiac dilation thus mimicking acute left ventricular dysfunction from volume overload [22, 92, 109]. Acute stretching of the annuli may cause worsening of valve function resulting in functional regurgitation. Inserting a peritoneal dialysis catheter intraoperatively and draining ascitic uid during pericardiectomy followed by peritoneal drainage for the next 24–48hours helps in preventing sudden auto-transfusion, increase in pre­load, and failure of Frank Sterling mechanism following surgery.
During the process of pericardial mobilization, repeated mechanical compres­sion results in myocardial oedema, which usually subsides over time [22, 23, 26, 92,
109]. It is difcult to ascertain a specic factor responsible for low cardiac output
syndrome post pericardiectomy. Although atrial brillation and high right atrial pressure are associated with poor outcomes, addressing tricuspid regurgitation or atrial brillation aggressively at the time of pericardiectomy is not advocated. If attempts to sustain cardiac output by the currently available medical treatment fails, then mechanical circulatory assistance may be the considered.
The use of intra-aortic balloon counterpulsation in patients undergoing pericar­diectomy for chronic constrictive pericarditis remains sporadic. Use of intra- aortic balloon counterpulsation facilitates recovery of left ventricular function by decreas­ing the left atrial and left ventricular end-diastolic pressure, thus helping the sys­temic ventricle and indirectly the pulmonary ventricle by the phenomenon of ventricular interdependence [28, 29, 56, 131]. The ease of application makes intra­aortic balloon counterpulsation preferred choice over left atrial-aortic assist devices [28, 29, 56, 131]. Since its use as an absolute “last resort” decreases its success rate and thus making the timing of initiation of support a difcult decision. Other assist device like veno-arterial extracorporeal membrane oxygenation and axial ow pumps can be used as salvage procedure [28, 29, 56, 91]. Use of intra-aortic balloon counterpulsation is limited in children due to technical difculties in inserting
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balloons, alongwith sparse availability and difculty in tracking rapid heart rates and narrow pulse pressures of children presenting in shock. Additionally, risk of complications like mesenteric ischaemia, renal failure and limb ischaemia is higher in children because of inappropriate balloon length [131].
An exhaustive search must be made for adequacy of pericardiectomy, and exclud­ing any surgically correctable cause(s) like signicant coronary artery disease, sig­nicant tricuspid and/or mitral regurgitation, or other correctable surgical lesions. For patients with left or right ventricular failure undergoing pericardiectomy lead­ing to biventricular failure, use of intra-aortic balloon counterpulsation may be suc­cessful. Finally, an early recognition of perioperative low cardiac output syndrome and judicious and timely manipulation of inotropes and/or mechanical counterpul­sation is the key to a successful outcome.
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11 Management ofChronic Constrictive Pericarditis